Hearing aid with a tightening ring

摘要

The present invention relates to a hearing aid for insertion in the auditory canal, comprising a hearing aid housing and a face plate and a shell that is matched to the auditory canal of a user and has a tightening protrusion that extends along the surface of the shell and at least partly encircles the shell thereby providing a tight seal against the auditory canal wall when the shell is inserted in the auditory canal.